﻿function StringBuilder() {
    this._element_ = new Array();
    this.append = function (item) {
        this._element_.push(item);
    }
    this.toString = function () {
        return this._element_.join("");
    }
    this.toJsonString = function () {
        return this._element_.join(",");
    }
    this.join = function (separator) {
        return this._element_.join(separator);
    }
    this.length = function () {
        return this._element_.length;
    }
}
function Map() {
    this.elements = new Array();
    // 获取MAP元素个数
    this.size = function () {
        return this.elements.length;
    }
    // 判断MAP是否为空
    this.isEmpty = function () {
        return (this.elements.length < 1);
    }
    // 删除MAP所有元素
    this.clear = function () {
        this.elements = new Array();
    }
    // 向MAP中增加元素（key, value)
    this.put = function (_key, _value) {
        this.elements.push({ key: _key, value: _value });
    }
    //增加元素并覆盖
    this.putOverride = function (_key, _value) {
        this.remove(_key);
        this.put(_key, _value);
    }
    // 删除指定KEY的元素，成功返回True，失败返回False
    this.remove = function (_key) {
        var bln = false;
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].key == _key) {
                    this.elements.splice(i, 1);
                    return true;
                }
            }
        } catch (e) {
            bln = false;
        }
        return bln;
    }

    // 获取指定KEY的元素值VALUE，失败返回NULL
    this.get = function (_key) {
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].key == _key) {
                    return this.elements[i].value;
                }
            }
        } catch (e) {
            return null;
        }
    }
    // 获取指定索引的元素（使用element.key，element.value获取KEY和VALUE），失败返回NULL
    this.element = function (_index) {
        if (_index < 0 || _index >= this.elements.length) {
            return null;
        }
        return this.elements[_index];
    }
    // 判断MAP中是否含有指定KEY的元素
    this.containsKey = function (_key) {
        var bln = false;
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].key == _key) {
                    bln = true;
                }
            }
        } catch (e) {
            bln = false;
        }
        return bln;
    }
    // 判断MAP中是否含有指定VALUE的元素
    this.containsValue = function (_value) {
        var bln = false;
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].value == _value) {
                    bln = true;
                }
            }
        } catch (e) {
            bln = false;
        }
        return bln;
    }
    // 获取MAP中所有VALUE的数组（ARRAY）
    this.values = function () {
        var arr = new Array();
        for (i = 0; i < this.elements.length; i++) {
            arr.push(this.elements[i].value);
        }
        return arr;
    }
    // 获取MAP中所有KEY的数组（ARRAY）
    this.keys = function () {
        var arr = new Array();
        for (i = 0; i < this.elements.length; i++) {
            arr.push(this.elements[i].key);
        }
        return arr;
    }
}
function form2Json(formName) {
    var form = document.getElementById(formName);
    if (form == null)
    {
        form = document.forms[0];
    }
    var sb = new StringBuilder(); var rcs = new Map();
    for (var i = 0; i < form.elements.length; i++) {
        var element = form.elements[i]; var name = element.name;
        if (typeof (name) === "undefined" || (name === null) || (name.length === 0)) { continue; }
        var tagName = element.tagName;
        if (tagName === 'INPUT' || tagName === 'TEXTAREA') {
            var type = element.type;
            if ((type === 'text') || (type === 'password') || (type === 'hidden') || (tagName === 'TEXTAREA')) {
                sb.append("\"" + name + "\":\"" + element.value.replace(/\r\n/ig, "") + "\"");
            } else if ((type === 'checkbox') || (type === 'radio')) {
                rcs.putOverride(name, type);
            } else { continue; }
        } else if (tagName === 'SELECT') {
            var oc = element.options.length;
            for (var j = 0; j < oc; j++) {
                if (element.options[j].selected) { sb.append("\"" + name + "\":\"" + (element.value) + "\""); }
            }
        }
    }
    if (rcs.size() > 0) {
        for (var i = 0; i < rcs.size() ; i++) {
            var r = rcs.element(i); var radio = "";
            var d = document.getElementsByName(r.key);
            if (r.value === "radio") {
                for (j = 0; j < d.length; j++) {
                    if (d[j].checked) { radio = d[j].value; }
                }
            } else {
                for (j = 0; j < d.length; j++) {
                    if (d[j].checked) { radio += "," + d[j].value; }
                }
                radio.substr(1);
            }
            sb.append("\"" + r.key + "\":\"" + radio + "\"");
        }
    }
    return "{" + sb.toJsonString() + "}";
}
